Pneumatic pile-feeder.



G. BRANDSTETTER & R. FREUND.

PNEUMATIC PILE FEEDER. APPLlCATlON FILED SEPT- 15, I913.

INVENTOR 5 Georg Brandstette r Patented Apr. 4, 1916.

4 SHEETS-SHEET 1 Richard Freu d '7 ATTORNEYS v G. BRANDSTETTER & R. FREUND.

PNEUMATIC PILE FEEDER.

APPLICATION FILED SEPT- 15, 1913.

Patented Apr. 4, 1916.

4 SHEETS-SHEET 2.

. IIWENTORS Geory Bran dsfefier Richard Fre nd BY ATTORNEYS G. BRANDSTETTER & R. FREUND.

PNEUMATIC PILE FEEDER. APPLICATION FILED SEPT-15,19I3.

1,178,293.. Patented Apr. 4,1916

4 SHEETS-SHEET 3.

. "wen/roles Georg Brand sfeher Richard Fre d BY W TORNEY5 G. BRANDSTETTER & R. FREUND.

PNEUMATIC PlLE FEEDER.

APPLICATION FILED SEPT-15.1913.

1,178,293. Patented Apr. 4, 1916.

4 SHEETSSHEET 4.

INVENTORS Georg? Brandsfeifer Richard Freu d BY TTORNEYS To all 'zblwm z'tmay concern:

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Be it known that W65 Gnone BRANDsTn'r- TER and RICHARD FREUND, subjects of the Emperor of Austria-Hungary,

residing at Hohenstadt, Moravia,

and Vienna, both I in the Empire of Austria-Hungary, have invented certain new and useful Improvements in Pneumatic Pile-Feeders; and we-do hereby declare the following tobe a full. clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. p Our-invention relates to automatic pile feeders for printing presses.

The object of our invention is to avoid the various deficiencies tobe met with in apparatus of this class as heretofore constructed.

In the. drawings Figures 1 and 3 are side elevations of our. improved apparatus viewed from opposite sides. Fig. 2-is a vertical sectin,'. Fig. 4 is a front elevation partly in -se'ction,.Fig. 5 is a sectionalplan view and- Fig. 6'shows diagrammatically the arrangement ofv air pipes andcocks. v

Qur improved pile feeder compris'es'two standards a. mounted on the side frames of the press and. connected With'each other by.

atransversebeam Z2 and a shaft 0 carrying at each of its ends a plurality of cams controllingthe-operation of various 'parts as hereinaftermore fully described and driven by a sprocket wheel d in synchronism with the printing press. The crank disk e" actuatesthrough the medium of a link 7, a lever g, the free end ofwhich is connected by a. link it ,to a tube 71 extending across the press andcaused to run up and down rails j as. the lever g is rocked. The lever gis connected by a shaft is to a similarlever on the other side of the press. which in turn is similarly connected; to the other end of the tube i-byalink 'h. 'The tube isp'rovidedwith nozzlesl and carries at'each of its ends a valve casing m. in which tWO'ValVGS nand o 'are mounted, the central part' of the .-casing being closed by a plug. The valves are connected byflexible pipes or hose p with a vacuum chamber 8' in which vacuum is maintained by a pump P. 'Both valves are operated by a three armed lever g, thel ongsaid lever open n and 0 and normally the position II In while the stops 8 are so connected with the llnk and lever gearing for actuating the press that they come out of the path of the valve lever 9' when the press is thrown ed.

in front of the pile of sheets the open position.- The stops 1' arestationary Patented Apr. 4t, 1916. a lication filed September 15, 1913. Serial no. 789,826.

ends of two pipes t are arranged from which air under pressure is blown against the front of the pile the outflow .ofsuc'h air bemg controlled by thevalve a which is operated by stops wand w in a manner similar to that described with reference to the valves held in-its open posit1o n by acatchnot shown. The valve lever mils mounted on an eccentrically, journaled pm find is brought out of the path of the stops. 0 and w by turning the said pin in its journals. The said pin is connected by link and lever mechanlsm y,.y" with the throwofi gearlng of the press, so that the valves u, n and 0' are thrown out of action simultaneously. The valve u is connected 'by a flexible supplied with air under pressure by the pumpP. The chambers D and S must be provided for reducing the variations of pipe or hose 2 with achamber D pressure due to the unequal number of revolutions of the press and the pump.

- v The valves n and 0 may be alternately connected with the chamber and the pump through a cock H orwith the pump only after turning the cockthrough an angle of degrees. In the cock H former case thepumpdraws air from the chamber- S and from the pipes p simultaneously. When the vacuum'becomes too high the valve a opens inwardly thuspermitting air to enter. During starting the cock is. in this position the pump P can communicate with the chamber S only after the 'valve a"'has been opened so that when the ivacuum becomes too high in the l pipe 10 air is drawn; from the chamber. The valve u can-be connected by the cock H alternately with. the chamber D and v the pump. In this cock 1 asafety '-valve bfis provided which when the" pressure becomes a safety valve a: 1s provided which is connected either with the atmosphere or with the chamber .too high permits air'to escape into the tmosphere in the position I and to enter i t the chamber in the position II. .1 0.

{The lower ends of the rails j are pivoted -so their upper ends can be raised and lowered by levers One of the levers 0' is a double armed one and carries at its other end a roller orbowl engaging the periphery of the crank disk e and is connected with the other lever c by a shaft (1?, Be-

fore the tube 6 reaches its uppermost pov sition the levers c are raised so that the said tube comes with its nozzles-just above the front edge of the pile. Just before the tube arrives in this position the valves n are opened by the stopss thus connecting the interior of the tuloeii. with the chamber S through the *pip''spein which chambervacuum is maintained by the pump P. Consequently air flows into the tube through 'the nozzles l and the uppermost sheet is taken up by and held against the ends of the nozzles by the pressune of the atmospheric air. As the rails continue their movement the tube z slides downward carrying with it the sheet. In .order that the sheet taken up may be firmly held the valves 12. are held in the; open position during this movement by a catch not shown.

most position the catch is released by the stops 1' andimmediately; thereafter the valves 0 are opened admitting air into the tube and the. sheet. dropped.

During the following upward'movement of the tube 21 the valves 0 are kept open until the tube has nearly reached its uppermost 'positionthen the catch is released by the stops 8 and the valves a are opened and the series of operations just described. is re- I 'p'eated.

. ,distanceequal to the thickness of a sheet. The tables 6 are suspended on screws f 2 fa 4. gg g g and ratchet wheels h 72.

,As the successive sheets hayeto'befed in the same manner the relative position of the ,pile, and'qthe tube 'i must remain un altered. In order to secure'this the table 6. is raised after the removal of a sheet, a

-the worm wheels g g. Thetables e are adapted to move transversely on the frames i'by means of the shafts, y" and cams k. The worm wheels are rigidly'connected with the ratchet wheels and are operated by link and leyer gearing Z from the shaft K. The

ratchet wheels and the worm wheels 9 g g and g are fixed on. hollow shafts m threaded onthe shaft 0. The shafts m may be connected with each other in the middle by a clutch not shown. If the two tables e ,carry paper of diflerent thickness such tables must be-raised at different speeds. In

this case the ratchet wheels must be operated at different speeds, Also the-vacuum and the pressure of the air must be regupaper. The two central screws f f may be removed and the two tables and the hollow shafts may be connected with each other and the ratchet wheelsmay be adjusted for .thesamespeed if it is desired to print on readily mounted in-position andv which is independent of the construction of the press and which can be operated by small pumps I running at a higher speed thanthe press.

By using the hollow shafts the space above the press is less encumbered because the table shaft mounted in thev old constructionsat the side of-the driving shaft is in the present apparatus mounted on the said driving shaft. In the same way on the shaft 0! connecting the two levers 0. another shaft 7 p required for controlling purposes may be Just before. the-tube 71- reaches its lowermounted. .By the worm-wheel gearing we are enabled to provide screw spindles within the table and further to easily vary the distance of the shaft 0 from the shaft so' that it may suit the lever stroke required at any time without otherwise changing the construction. By using the worm wheels we are further enabled to rai the two halves of the table independently the one of the other. 5 Mounting the controlling valves directly on thesuction tube offers the advantage that itis only the comparatively small tube that has to be evacuated for feeding each sheet whereas in the old construction a long pipe system or even the entire lated to suit the difierent thickness of the space up to the pump piston had to be evacuated which involves a considerable loss of power. By the arrangement of two vacuum valves on both ends of the suction tube the further advantage is obtained that with large sheets and high printing speeds the suctionis uniform and comes into action at the same moment over the entire suction tube whereas with the usual arrangement of the valve at one end only of the suction tube it may happen that this tube catches hold of the sheet at the end near the valve faster than atthe other ends which results in an irregular feeding of the sheet.

The same is true with the destruction of vacuum. With one air admission valve at one end only-of the tube, the sheet seized is liable to be released at one side earlier than at the other side undemthe above named conditions and therefore to assume an incorrect position .r'elatively to the register pins. By connecting the "stops .9 with the throw ofi gearing of the press we avoid that a sheet can be seized and fed after throwamazes ing oil the press, whereas with the lmown apparatus it may happen that a sheet seized is not released on throwing off the press and is torn to pieces in being continued to be fed. By operating the lever w in the manner above described we avoid that the valve u is opened and air under pressure is con sumed after throwing off the press. I

By connecting the cooks H H with the throw-01f gearing of the press the. result is secured that sheets are fed at the-first revolution of the press, as by the direct connection of the valves 91. and u with the pump, the vacuum or air under pressure required is produced atonce while on the other hand at the same time the vacuum and pressure chambers are prepared for the regular operation of the apparatus, vacuum being produced and air under-pressure being accumu-- lated respectively in the said chambers. In the so-called stop cylinder presses it must never happen that the press operates without a sheet being interposed. If now a pump not running in synchronism with, the press is used, this might happen in starting the press if there be not sufficient vacuum in the vacuum chambers as will be the case when the press has been stopped for some time. The same is true of thechamber for air under pressure.

" Clalms 1. In a pneumatic pile feeder the combi-'- nation of a feeding tube, valves for controlling the admission of air into 'such tube and the suction conduits connected with such tube. such valves being located at both ends of the said feeding tube, link and lever mechanism adapted-to be connected with the throw off gearing of the press, stops con-' nected with such link and lever gearing and adapted to actuate the said valves controlling the suction conduits whereby on throwing off the press the said stops are brought out of engagement with the said valves, and

means independent of the said link and 1eve r gearing and adapted to actuate the air admission valves on the feeding tube,

2. In a pneumatic pile feeder the combination of a feeding tube, valves for controlling the admission of air into such tube and the suction conduits connected with such tube, such 'valvesbeing'located at both ends of the said feeding tube, link and lever mechanism adapted to be connected with V the throw 01f gearing of the press, stops connected with such link and lever gearing and adapted to actuate the said valves controlling the suction conduits whereby on throwing ofi the press the said stops are moved out of the, path of the. said valves, and levers journaled on eccentrically journal'ed pins for actuating the air admission valves and actuated by said stops, the said levers being connected with the said throw ofl" link and lever mechanism.

3. In a pneumatic pile feeder, the combination of an air pump, a vacuum chamber, a chamber for accumulating air under pressure, pipes connecting the air pump with the said chambers and automatic valves in such pipes, substantially as and for the purpose described.

at. In a pneumatic pile feeder,.the combination of an air pump, a vacuum chamber, a chamber for air under pressure, pipes connecting the air pump with the said chamber, cocks interposed in such pipes and an automatic safety valvemounted in eachof such cocks substantially as and for the purpose described. L

5. In a pneumatic pile feeder, the combination of an air pump, a vacuum chamber, a chamber for air under pressure, pipes connecting the air pump with the said chambers, cocks interposed in such pipes, an auto- 'matic safety valve mounted in each of such cocks, a feed-tube, valves for controlling the admission of air to the said tube, and a link and lever mechanism adapted to be connected with the throw oif gearing of the press and from which the said valves are operated, substantially as and for the purpose described. 1 w 6. In a pneumatic feeder,the combination of a suction tube, .suction means to create a vacuum in the tube, air inlet and outlet; valves commanding the tube, means to actuate the valves in succession and means adapted to be connected with throwoff mechanism] of the press arranged to throw the said valve-actuating means out of action.

In testimony whereof, we affix our signatures, in presence of two witnesses.

GEORG BRANDSTETTER. RICHARD FREUN D.

Witnesses ARTHU BAU'MANN, Auous'r FUoenR. 

